var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());

// app.use('/', indexRouter);
// app.use('/users', usersRouter);

//get 请求静态文件 配置 
var history = require('connect-history-api-fallback');
app.use(history({
  rewrites: [
    {//访问路径含dist则继续访问
      from: /^\/dist\/.*$/,
      to: function(context) {
        return context.parsedUrl.pathname;
      }
    },
    {//后缀为js
      from: /^\/.*js$/,
      to: function(context) {
        if(context.parsedUrl.pathname.indexOf('/js/')>0){
          return '/dist/js/'+context.parsedUrl.pathname.split('/js/')[1];
        }else{
          return '/dist/'+context.parsedUrl.pathname;
        } 
      }
    },
    {//后缀为css
      from: /^\/.*css$/,
      to: function(context) {
        if(context.parsedUrl.pathname.indexOf('/css/')>0){
          return '/dist/css/'+context.parsedUrl.pathname.split('/css/')[1];
        }else{
          return '/dist/'+context.parsedUrl.pathname;
        } 
      }
    },
    {// icon矢量图
      from: /\.(eot|ttf|woff|woff2)$/,
      to: function(context) {
          return '/dist/'+context.parsedUrl.pathname;
      }
    },
	{//图片
	  from: /\.(png|jpg|gif|txt)$/,
	  to: function(context) {
	      return '/dist/'+context.parsedUrl.pathname;
	  }
	},
    {//访问路径不含dist则默认访问/dist/index.html
      from: /^\/.*$/,
      to: function(context) {
        return '/dist/';
      }
    },
  ]
}));
app.use(express.static(path.join(__dirname, 'public')));

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
